Tilted SEM images. (a) QNP arrays and (b) wet chemically etched SiNW arrays. (c) Photographic images of artificial CTCs capturing/isolating assembly including nine cell-separation chamber (PDMS) and wet-chemically etched SiNW arrays (2.5 × 2.5 cm2). Both surfaces of QNP and SiNW arrays were functionalized by a high affinity biotin-STR conjugation technique.
Kim et al. Nanoscale Research Letters 2012 7:637 doi:10.1186/1556-276X-7-637